Java Repeat first while loop if condition in second while loop is true

Code
import java.util.Scanner;

import java.text.*;



public class TemperatureConversion

{

    public static void main(String[] args)

    {

        System.out.println("Welcome to the Temperature Converter\n");

        Scanner scChoice = new Scanner(System.in);

        Scanner scTemp = new Scanner(System.in);

        Scanner scCont = new Scanner(System.in);

        String choice;

        String cont;

        double finalTemp;

        double fahrenheit;

        double celsius;

        boolean loop = true;

        boolean contAsk = false;

        DecimalFormat df = new DecimalFormat("###,###.##");

        

        System.out.print("Would you like to convert Fahrenheit or Celsius? (F/C):");

        choice = scChoice.next();



        while(loop = true){

                        

            if(choice.equalsIgnoreCase("f")){

                System.out.print("Enter the temperature:");

                fahrenheit = scTemp.nextDouble();

                finalTemp = (fahrenheit - 32) * .5556;

                System.out.print(fahrenheit + " degrees Fahrenheit is " + df.format(finalTemp) + " degrees Celsius.\n");

                contAsk = true;

                loop = false;

                break;

            }else if (choice.equalsIgnoreCase("c")){

                System.out.print("Enter the temperature:");

                celsius = scTemp.nextDouble();

                finalTemp = 32 + (celsius * 1.8);

                System.out.print(celsius + " Celsius is " + df.format(finalTemp) + " degrees Fahrenheit.\n");

                contAsk = true;

                loop = false;

                break;

            }else if (!choice.equalsIgnoreCase("f") && !choice.equalsIgnoreCase("c")){

                System.out.print("Error: invalid entry\n");

                System.out.print("Would you like to convert Fahrenheit or Celsius? (F/C):");

                choice = scChoice.next();

                }

            }

        

            System.out.println("Continue? (Y/N):");

            cont = scCont.next();

        

        while(contAsk = true){

                

            if(cont.equalsIgnoreCase("y"))

            {

                loop = true;

            }else if (!cont.equalsIgnoreCase("y") && !cont.equalsIgnoreCase("n")){

                System.out.println("Error: invalid entry\n");

                System.out.println("Continue? (Y/N):");

                cont = scCont.next();  

            }else if (cont.equalsIgnoreCase("n"))

                return;

            }

        }

}